House heating boiler



J. B. DETWILER HOUSE HEATING BOILER Aug. 9, 1949.

2 Sheets-Sheet 1 Filed April 30, 1945 I rn/eh for Aug. 9, 1949. J. B. DETWILER 2,478,687

' HOUSE HEATING BOILER 2 She ets-Sheet 2 Filed April 30, 1945 InVen ipr 41 AZ 5 I E i 3 @Il Patented Aug. 9, 1949 UNITED STATES PATENT OFFICE 2,478,687 7 HOUSE HEATING BOILER V 7 John B. Detwiler, Mimico, Ontario, Canada Application April 30, 1945, Serial No. 591,153 I This invention relates to improvements in the vertical type of tubeless boiler particularly adapted for house heating purposes and the principal object of the invention is to materially increase the 'efliciency of such boilers by effecting a substantial increase in the length of travel of the gases of combustion and the efiective area of heat transfer surface contacted by such gases.

A further and important object is to devise a simple construction of boiler which may be fabricated at extremely low cost and which readily lends itself to mass production.

A still further object is to provide a boiler which will operate efficiently with the minimum of care and attention, will be easy to regulate and contains no intricate or delicate parts liable to get out of order.

The principal feature of the invention consists in fabricating a main water jacketed section of steel plate and forming water jacketed extensions spaced from said main section and forming flue passages connected with the combustion chamber of the main section to conduct the gases of combustion in contact with both sides of a substantial portion of said main section and provide an extended active heat transfer passage for such gases for applying heat to the water in said jackets.

A further important feature consists in the provision of a water containing chamber extending across the main water jacketed section intermediate of its height and above the openings connecting the combustion chamber with the extended water jacketed flue passagesand providing a damper controlled flue passage therethrough to provide a, direct draft, such transverse water chamber being connected with the water jacket of the mainsection to affect an accelerated .water circulation through the boiler.

In the accompanying drawings Figure 1 is a half front elevation and half vertical mid-section of the preferred-form of my invention.

Figure 2 is a cross section through the boiler taken on the line 2-2 of Figure 1.

.44 of Figure 5.

r Figure 5 is a cross sectional view of the boiler shown in Figure 4 taken on the line 5--5 of Fig- 'ure 4.

Figure 6 is a part plan cross sectional view on a reduced scale taken on the line 6-6 of Figure 5i.

3 Claims. (Cl. 122-161) said plates.

In the preferred construction illustrated in Figures 1 and 2,'the main central water jacketed section is formedof a'central steel tube l which may be formed of a single steel plate rolled to shape and having the meeting edges secured in a single welded longitudinal joint.

A larger tube 2, also formed of a single rolled steel plate and joined with a longitudinal seam is of a suitable diameter to form a water jacket of desired dimensions.

Suitable ferrules formed of steel plate areiabri- 'cated to form frames to connect the inner and outer tubes 1 and'2 around the firedoor opening- 3 into the combustion chamberll, the side flue openings =5 leading out ofthe combustion cham her and the rear flue'opening 6 opening to the combustion chamber and also the clean-out opening spaced'above the firedoor opening.

The edges of these ferrules will be welded to the inner and outer tubes l anad 2 and a rigid structure is thus formed.

The inner tube I is formed with a ring of orifices 8 above the flue openings 3 and 5 and they are preferably disposed ina diagonal plane.

Circular plates9 and Ill are welded in spaced transverse planes above, and below the ring of orifices 8 thus forming a water jacketed top to the combustion chamber 4; These plates 9 and I!) are each formed with'openings ll here shown of oval shape and a ferrule I2 is welded to the said plates'to form a flue opening connecting the combustion chamber land the chamber l3 above Dished circular crown plates [4 and I5 closing the tops of the tubes l and 2 are welded in position and spaced'apart' to form a top water jacket connected with the jacket between the tubes l and 2.

'larger diameter than the plate I6 is spaced outside thesaid plate IB and forms a water jacket IS, the ends thereof being turned inward to meet the outer wall of the outer tube 2 to which they are welded.

The plate [8 extends above the plate l6 and horizontal plates 20 and 2| are cut to fit the outer wall of the tube 2 and are welded to same in vertically spaced relationand to the top edges of the plates 16 and I8 respectively. Openings 22 are cut in the outer tube 2 to connect the water jacket IS with the jacket between the tubes I and 2.

Vertical bafiles 23 and 24 are arranged between the outer side of the tube 2 and the spaced inner plate I 6 and are welded in position to extend downwardly from the top plate 20, leaving flue passages 25 atthelower ends.

A circular ringplate 16 is weldedtothebottom end of the plate t6 and to the bottom end of the tube 2 which is spaced above the bottom of the tube I and a bottom ring plate 21 is welded the inner water jacket 2' arrd -the outer-part cylindrical jacket I9. 7

Suitable clean-out opening ferrules 28 are ar ranged at the bottom of the outer jacket l-9.to. allow access to the bottom of the flue passa e Hf between theinner anduouter-water jackets.

Suitable return water; ccnnectionsi 2 7 1 ranged in the outerplatenId-closetmthe bottom and a mainhot water eonnectionierrule 30 is arranged in. thecentre: of -the upper crown l:5.

A main dampercontrolled-outlet fine 31 extends through ,andzis: welded to the-tubes l and 2; close to the, crown sheet,- H.

A suitable damper ;3-2-

pivotally. connected to control the flue openin H formedin: the in.- clined water jacketed partitionformed between the plates 9 and. Mia and is. cnntrolled by a damper rod 33 shown extendingwthroug-lr the clean-out door opening 7.

It will of course be understood that: doors suitably hinged Wi11':(71'6S6lthB!fiIZ& door-and, cleanout door openings.

In the form of-thelinvention-'illustrated .in Figuresv 4 and 5., plates 33-311113355 for themajor portion of theirheight-are'formedr-in U1 shape, the inner plate 35 being bentatia lesser radius than the outer plate'34l=and theyarespaced apart a suitable distance to :i'orm a water jacket 36 therebetween. The upperportions: 31 and 38. of these plates instead of beingcontmuedpast. the transverse diameter at atangentare bent. to form thecompleti'on of atoylind'er and-the abutting ends are welded and these-tubular extensions are closed. at the top by 'the crown-plates 39 and 40.

The tangential side-walls H and fl oithe u-shaped portionsofi the plates-34 and 35 are connected at their vertical ends by plates and .44 spaced apart to forma-con-ti'nuation of the water jacket 36.

Top plates 4-5 and cut. tospan-Jthe space between the inner and enter plates-and. to I extend between the parallel tangential side walls and the end-plates 43 and 44-.are-welded' inplace at the lower endof the. uppercylindrical portions 31: and 3.8 and thus. continue fthe water jacket.

In the lower portion of the .double walled U-shaped structure thus tormedare-placed and welded in'position the part' cylindrical sheets 41 and 48 which thus form-a.-cylindrical.combustion chamber &9. 'fiIhe upper ends of the sheets 41 and. 48 are SIJaCGfiC'bBIQWthG upper cylindrical portions '31 and-38 to-ificrmzaiflue opening-:50.

Spaced-apart bottom. sheets; 5t and: 52' connect the outer vertical gpart :cylindiicaI she'ets- 48 and 4-3, and 4'! and 44 respectively and are :welded in position.

A spaced-apart. pair ofpartcylindrical sheets 53 and 54' are arranged vertically in mid-position between the. sheets. .4 I. and anduthe hottom ends are connected at a point spaced above the bottom plates 5| by a plate 55 leaving a flue passage 53 thereunder.

The upper ends of the sheets 53 and 54 extend to a point about midway of the height of the flue passage 50 and to the ofiset upper ends of these sheets are welded the spaced diagonally arranged sheets 5? and 58 which extend to the vertical tangential walls 4| and 42 and project across the comb-,ustion, chamber and lit and are welded to the inner half cylindrical front wall of the inner u -shaped plate 35.

Water flow openings in the plate 35 connect the water jacket 36 with the space between the sheets 51 and 58.

It-will thus be seen that a completely Waterjacketed. fluev is formed leading below the spaced diagonal plates downwardly between and under thecross jacket formed by the plates 53 and 54 and up the outer side thereof and over the top Qfrthe paired diagonal plates to an upper chamberte from-whence the gases of combustion are directed through a fine opening 50.

In both constructions of boiler herein shown and described it-will be seen that the gases of combustion rising. in the combustion chamber strike a water-jacketed inclined baflle and then flow laterally through side flue passages and I are directed first downwardly under the vertical bames 23 and 24; as shown in Figures 1 and 2 or thewater-jacketed vertical, baffle formed by the plates 53 and 5.4 and then re-enter the central ehamber above the diagonal baffle beforepass- ;,i;ng out through the discharge flue.

The. gases of, combustion, are thus brought into heat, exchange-relation with their walled waterjackets over an extremely long passage or passageswith'theresult that a very rapid and con- 1-tinued heat exchange is created to heat and circulate the water entering at. the bottom and leaving at the top.

The steel construction readily lends itself to lmassproduction. All the sheets can be pre-cut and shaped ready to be fitted together and welded iii-sequence and the sheets are so designed that accurate welding can be effected at all joints sories to' the main boiler structure and canbe of varying designs and constructions. and do not jfOlITl part of the present invention.

What I claim as my invention is:

1.A vertical boiler comprising, a substantially cylindrical water jacketed structure having. a

transverse water jacketed partition intermediate of its height and in communication with the water jacket of said cylindrical structure, flue openings through said cylindrical structure below and abovesaid transverse partition, a flue opening through said water jacketed partition, damper means for closingsaid last-mentioned opening water jacketed extensions extending laterally from and partly surrounding the cylindrical structure and in communication withthe water jacket of said cylindrical structure and spaced therefrom'to-form flue passages connecting the lower flue openings from the cylindrical structure with the upper flue openings therein, and means interposed in said flue passages for baflling the gases oi combustion in their travel from the lower to the upper flue openings when the flue opening through said water jacketed partition is closed by said damper means.

2. A vertical boiler comprising, a substantially cylindrical water jacketed structure having a flue opening adjacent the top and a transverse water jacketed partition intermediate of its height and forming a combustion chamber in the lower portion, a central opening through said partition and providing direct communication between said flue opening and combustion chamber, damper means closing said central opening flue openings from said combustion chamber, a water jacketed structure arranged outside of and spaced from the outer wall of said combustion chamber and forming water jacketed flue passages, a flue opening communicating with said flue passages and entering said cylindrical structure above said transverse partition to direct gases of combustion from within said combustion chamber through water jacketed paths across the upper surface of said water jacketed partition, said water jacketed structures being in communication to permit free circulation of water therein.

3. A Vertical tubeless boiler comprising, a main water jacketed section enclosing a combustion chamber and having a fuel-receiving opening in the wall thereof, a closure for said opening, an inclined water jacketed partition connected with said main water jacketed section and extending across said combustion chamber intermediate of its height to define upper and lower chamber sections, water jacketed extensions connected with said main water jacketed section and extending around said main water jacketed section from adjacent one side of said fuel-receiving opening to the other side thereof and forming flue passages opening into said chamber sections and arranged to lead combustion gases passing therethrough from said lower to said upper chamber section over a substantial portion of the outer heat transfer surface of said main section, and a damper controlled by-pass flue arranged in the upper portion of said partition to direct, when open, gases of combustion reflected upwardly by the inclined partition from the combustion chamber directly to said upper chamber section.

JOHN B. DETWILER.

REFERENCES CITED The following references are of record in the 

